setup.sh fails due to deprecated use of preg_replace

To reproduce:

• be on a relatively new version of PHP (I'm on 5.5.3-1ubuntu2.3)
• checkout the 4.4 branch of the core, drupal, and packages repositories
• run bin/setup.sh

The script will output:
PHP Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /var/www/localhost/htdocs/sites/all/modules/civicrm/packages/Smarty/Smarty_Compiler.class.php on line 270

The message is printed to civicrm-version.php as well as STDOUT, so the file becomes unparseable, which causes errors further along the setup process (either the "Creating database structure" step civicrm_generated.mysql step, I think). The result is a broken site.